. Introduction to structural and systematic botany, and vegetable physiology. Botany. EXOGENOUS OR DICOTYLEDONOUS PLANTS. 387 definite stamens, or nearly so, with innate anthers, and the gynascium of few apocarpous, free, and few-ovuled pistils ; the ovules chiefly on the dorsal suture. Brasenia and Cabomba are all the 751. Ord. ^amcmiaWK (Water-Pitcher Family). Perennial herbs, growing in bogs; the (purplish or yellowish-green) leaves all radical and hollow, pitcher-shaped (Fig. 299, 300), or trumpet-shaped. Calyx of five persistent sepals, with three small bracts at its base. Coroll
. Introduction to structural and systematic botany, and vegetable physiology. Botany. EXOGENOUS OR DICOTYLEDONOUS PLANTS. 387 definite stamens, or nearly so, with innate anthers, and the gynascium of few apocarpous, free, and few-ovuled pistils ; the ovules chiefly on the dorsal suture. Brasenia and Cabomba are all the 751. Ord. ^amcmiaWK (Water-Pitcher Family). Perennial herbs, growing in bogs; the (purplish or yellowish-green) leaves all radical and hollow, pitcher-shaped (Fig. 299, 300), or trumpet-shaped. Calyx of five persistent sepals, with three small bracts at its base. Corolla of five petals. Stamens numerous. Summit of the com- bined styles very large and -petaloid, five-angled, covering the five- celled ovary, persistent. Fruit five-celled, five-valved, with a large placenta projecting from the axis into the cells. Seeds numerous, albuminous, with a small embryo. — Sarracenia, from which the above character is taken, was the only known genus of the order, until the recent discovery of Heliamphora in Guiana, which is apeta- lous, its scape bearing several flowers; as does that of a third genus, FIG. 681. Brasenia peltata (Water-shield) ; the lower flower with the floral envelopes and a part of the stamens removed. 682. A magnified stamen. 683. A magnified carpel. 684. The same, divided lengthwise, showing the ovules attached to the outer or dorsal suture! 685. Sec- tion of a carpel, in fruit. 686. A magnified seed, with half the outer integument removed, displaying at the upper extremity the bag which contains the embryo. 687. A magnified sec- tion through the middle of the albumen, &c. j bringing to view the minute embryo enclosed in its sac, lying outside of the albumen, which forms the principal bulk of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gray, A
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1850, booksubjectbotany
